JP6951941B2

JP6951941B2 - Pipe fitting

Info

Publication number: JP6951941B2
Application number: JP2017207770A
Authority: JP
Inventors: 優秀鈴木; 佐々　武也; 武也佐々
Original assignee: Nitto Kohki Co Ltd
Current assignee: Nitto Kohki Co Ltd
Priority date: 2017-10-27
Filing date: 2017-10-27
Publication date: 2021-10-20
Anticipated expiration: 2037-10-27
Also published as: JP2019078387A

Description

本発明は、端面シール部材を有する管継手に関し、より具体的には、対応する管部材を端面シール部材に当接させることにより、管部材との密封係合するようにされた管継手に関する。 The present invention relates to a pipe joint having an end face sealing member, and more specifically, to a pipe joint in which a corresponding pipe member is brought into contact with the end face sealing member so as to be hermetically engaged with the pipe member.

管継手において、その前端面に端面シール部材を有し、この端面シール部材を介して対応する管部材又は管継手の前端面と密封するようにしたものがある。例えば特許文献１に示される雌型継手においては、流路を画定する継手本体部と、継手本体部内において長手軸線方向で変位可能に配置されたスライド部材とを有し、スライド部材の前端面に端面シール部材が取り付けられている。雌型継手の流路内に対応する雄型継手が挿入されると雄型継手の前端面が端面シール部材に当接し、さらに雄型継手を挿入することにより、雄型継手は雌型継手に連結される。この連結状態においては、スライド部材を付勢しているスプリングが圧縮され、端面シール部材はこのスプリングの付勢力により雄型継手の前端面に押し付けられて、雄型継手の前端面と密封係合する。 Some pipe joints have an end face sealing member on the front end face thereof, and are sealed with the corresponding pipe member or the front end face of the pipe joint via the end face sealing member. For example, the female joint shown in Patent Document 1 has a joint body portion that defines a flow path and a slide member that is displaceably arranged in the longitudinal axis direction in the joint body portion, and is provided on the front end surface of the slide member. An end face sealing member is attached. When the corresponding male joint is inserted into the flow path of the female joint, the front end face of the male joint comes into contact with the end face sealing member, and by further inserting the male joint, the male joint becomes a female joint. Be connected. In this connected state, the spring urging the slide member is compressed, and the end face sealing member is pressed against the front end face of the male joint by the urging force of this spring, and is sealed and engaged with the front end face of the male joint. do.

このような管継手における端面シール部材は、通常、接着材により固定されるか、又は焼き付け固定されている。したがって、端面シール部材は、基本的には取り外せないようになっている。 The end face sealing member in such a pipe joint is usually fixed by an adhesive or baked and fixed. Therefore, the end face sealing member is basically immovable.

特開２０１３−２３１４７２号公報Japanese Unexamined Patent Publication No. 2013-231472

管継手同士の着脱が頻繁に行なわれる場合や、高温雰囲気などの苛酷な環境で使用される場合、又は腐食性流体を取り扱う場合など、管継手の使用状況によっては、端面シール部材が劣化したり損傷したりすることがある。従来の管継手においては、上述のように端面シール部材は取り外せないように固定されているため、端面シール部材だけを交換することは、実質的に不可能であるか、又は管継手を取り外して製造元に修理を依頼するなどしなければならず手間と時間のかかる作業となる。そのため従来は端面シール部材だけに不具合が生じた場合であっても管継手全体を交換するようにしており、コストが嵩んでいた。 Depending on the usage conditions of the fittings, the end face sealing member may deteriorate, such as when the fittings are frequently attached and detached, when used in a harsh environment such as a high temperature atmosphere, or when handling corrosive fluids. It may be damaged. In the conventional pipe joint, since the end face sealing member is fixed so as not to be removed as described above, it is practically impossible to replace only the end face sealing member, or the pipe joint is removed. It is a laborious and time-consuming work because the manufacturer must be requested to repair it. Therefore, conventionally, even if a defect occurs only in the end face sealing member, the entire pipe joint is replaced, which increases the cost.

そこで本発明は、端面シール部材の交換を容易に行えるようにした管継手を提供することを目的とする。 Therefore, an object of the present invention is to provide a pipe joint in which the end face sealing member can be easily replaced.

すなわち本発明は、
前端開口から後方に延びる流路を画定する流路構成部材と、
該流路構成部材の前端面において該前端開口の周囲に配置された環状の端面シール部材と、
該流路構成部材の外周面上に配置され、該端面シール部材を該前端開口の周囲に保持するホルダと、
該流路構成部材の外周面と該ホルダの内周面とのうちの一方の面に形成されたリング保持溝内に保持され、該流路構成部材の外周面と該ホルダの内周面とのうちの他方の面に係合して、該端面シール部材を保持する位置に該ホルダを係止する係止リングと、を備え、
該他方の面に、前方に向かって径方向外側に傾斜した係止傾斜面が設けられており、
該ホルダに対して所定の大きさ以上の前方への力を加えたときに、該係止リングが該係止傾斜面に押されて該リング保持溝内に弾性変形して該係止リングによる該ホルダに対する該係止が解除され、該ホルダが前方に変位して該端面シール部材が該流路構成部材と該ホルダとの間から取り外し可能となるようにされた、管継手を提供する。 That is, the present invention
A flow path component that defines a flow path extending rearward from the front end opening,
An annular end face sealing member arranged around the front end opening on the front end face of the flow path component, and
A holder that is arranged on the outer peripheral surface of the flow path component and holds the end face sealing member around the front end opening.
It is held in a ring holding groove formed on one of the outer peripheral surface of the flow path constituent member and the inner peripheral surface of the holder, and the outer peripheral surface of the flow path constituent member and the inner peripheral surface of the holder. A locking ring that engages with the other surface of the holder and locks the holder at a position that holds the end face sealing member.
The other surface is provided with a locking inclined surface that is inclined outward in the radial direction toward the front.
When a forward force of a predetermined magnitude or more is applied to the holder, the locking ring is pushed by the locking inclined surface and elastically deformed into the ring holding groove by the locking ring. Provided is a pipe joint in which the lock to the holder is released and the holder is displaced forward so that the end face sealing member can be removed from between the flow path component and the holder.

当該管継手においては、ホルダに対して所定の大きさ以上の前方への力を加えることにより、係止リングによる係止が解除されてホルダが前方に変位し、これにより端面シール部材を取り外すことができるようになっている。したがって、端面シール部材の交換を容易に行なうことが可能となる。 In the pipe joint, by applying a forward force of a predetermined size or more to the holder, the locking by the locking ring is released and the holder is displaced forward, whereby the end face sealing member is removed. Can be done. Therefore, the end face seal member can be easily replaced.

具体的には、該一方の面が該流路構成部材の外周面であり、該他方の面が該ホルダの内周面であるようにすることができる。 Specifically, one surface may be the outer peripheral surface of the flow path constituent member, and the other surface may be the inner peripheral surface of the holder.

この場合には、
該ホルダの内周面に内側に向かって突出した係止突起が形成されており、該係止突起の前方面が該係止傾斜面であり、該係止突起の後方面が後方に向かって径方向外側に傾斜した取付用傾斜面であり、
該ホルダを該端面シール部材が取り外し可能となる位置から該流路構成部材に対して後方に変位させたときに、該係止リングが該取付用傾斜面に押されて該リング保持溝内に径方向内側に弾性変形し、該係止突起が該係止リングの外側を通過して該係止傾斜面が該係止リングと係合するようにすることができる。 In this case
A locking projection protruding inward is formed on the inner peripheral surface of the holder, the front surface of the locking projection is the locking inclined surface, and the rear surface of the locking projection is toward the rear. It is an inclined surface for mounting that is inclined outward in the radial direction.
When the holder is displaced rearward with respect to the flow path component from a position where the end face sealing member can be removed, the locking ring is pushed by the mounting inclined surface into the ring holding groove. It can be elastically deformed inward in the radial direction so that the locking projection passes outside the locking ring and the locking inclined surface engages the locking ring.

このような構成により、一旦係止リングによる係止が解除されたホルダを後方に押し込むだけで、該ホルダを再び係止リングにより流路構成部材に対して係止された状態とすることができる。したがって、端面シール部材の取り付け作業を容易に行なうことが可能となる。 With such a configuration, the holder can be brought into a state of being locked to the flow path constituent member by the locking ring again by simply pushing the holder once released by the locking ring to the rear. .. Therefore, the work of attaching the end face seal member can be easily performed.

好ましくは、
該端面シール部材の外周面に前方に面した段差部が形成され、
該ホルダが、該流路構成部材に取り付けられたときに該端面シール部材の該段差部を前方から係止する段差係止部を有するようにすることができる。 Preferably,
A step portion facing forward is formed on the outer peripheral surface of the end face sealing member.
The holder may have a step locking portion that locks the step portion of the end face sealing member from the front when attached to the flow path constituent member.

このような構成により、端面シール部材の保持を確実に行なうことが可能となる。 With such a configuration, it is possible to reliably hold the end face sealing member.

好ましくは、該流路構成部材が、該前端面から前方に延びて該端面シール部材の内周面を支持する支持部を有するようにすることができる。 Preferably, the flow path component can have a support portion that extends forward from the front end face and supports the inner peripheral surface of the end face seal member.

このような構成により、端面シール部材が過度に内側に変形して流路構成部材とホルダとの間から外れてしまうことを防止することが可能となる。 With such a configuration, it is possible to prevent the end face sealing member from being excessively deformed inward and coming off from between the flow path constituent member and the holder.

具体的には、該係止リングがＣ字状のストップリングであるようにすることができる。 Specifically, the locking ring can be made to be a C-shaped stop ring.

さらに具体的には、
該流路構成部材が、筒状の継手本体部と、該継手本体部の内側に配置され該流路を閉止する閉止位置と該閉止位置から後方に変位して該流路を開放する開放位置との間で変位可能に配置されたバルブ部材とを有し、
該バルブ部材が少なくとも該閉止位置において該継手本体部よりも前方にまで延在していて、該バルブ部材の前端部分に該端面シール部材及び該ホルダが取り付けられるようにすることができる。 More specifically
A cylindrical joint main body, a closing position where the flow path component is arranged inside the joint main body and closes the flow path, and an open position where the flow path is displaced rearward from the closing position to open the flow path. Has a valve member that is displaceable between and
The valve member may extend forward of the joint body at least in the closed position so that the end face sealing member and the holder can be attached to the front end portion of the valve member.

以下、本発明に係る管継手の実施形態を添付図面に基づき説明する。 Hereinafter, embodiments of the pipe joint according to the present invention will be described with reference to the accompanying drawings.

本発明の一実施形態に係る管継手の非連結状態における側面断面図である。It is a side sectional view in the unconnected state of the pipe joint which concerns on one Embodiment of this invention. 図１の管継手の連結状態における側面断面図である。It is a side sectional view in the connected state of the pipe joint of FIG. 図１の管継手の前端部分の拡大図である。It is an enlarged view of the front end portion of the pipe joint of FIG. 端面シール部材の交換作業工程を示す第１の図である。It is the first figure which shows the replacement work process of the end face seal member. 端面シール部材の交換作業工程を示す第２の図である。It is a 2nd figure which shows the replacement work process of the end face seal member. 端面シール部材の交換作業工程を示す第３の図である。It is a 3rd figure which shows the replacement work process of the end face seal member. 端面シール部材の交換作業工程を示す第４の図である。It is a 4th figure which shows the replacement work process of the end face seal member.

本発明の一実施形態に係る管継手１０は、図１に示すように、筒状の継手本体部１２及びこの継手本体部１２の内側に配置されたバルブ部材１４からなる流路構成部材１６と、バルブ部材１４の前端部分１８に取り付けられた環状の端面シール部材２０と、バルブ部材１４の外周面２２に配置されて端面シール部材２０をバルブ部材１４の前端部分１８に保持するホルダ２４とを備える。バルブ部材１４は前端開口２６から後方に延びる前方流路２７を有し、継手本体部１２は後端開口２８から前方に延びる後方流路２９を有する。継手本体部１２とバルブ部材１４との間は摺動シール部材３２により密封されていて、前方流路２７と後方流路２９とにより前端開口２６から後方に延びて後端開口２８にまで至る流路３０が構成されている。また、継手本体部１２とバルブ部材１４との間にはバルブ部材１４を前方（図で見て右方）に付勢するスプリング３４が配置されており、図１の非連結状態においては、バルブ部材１４のシール面３６がスプリング３４の付勢力によって継手本体部１２の弁座部３８に押し付けられて、流路３０が閉止されている。図２に示すように、対応する管部材１を、その前端密封面２が端面シール部材２０と当接するようにしてバルブ部材１４に押し付けると、バルブ部材１４は流路３０を閉止していた閉止位置（図１）から後方（図で見て左方）に変位して流路３０を開放する開放位置（図２）に変位する。このとき端面シール部材２０は、スプリング３４の付勢力によって管部材１の前端密封面２に押し付けられ、前端密封面２と密封係合した状態となる。これにより当該管継手１０は対応する管部材１と連結した状態となる。 As shown in FIG. 1, the pipe joint 10 according to the embodiment of the present invention includes a flow path constituent member 16 composed of a tubular joint main body 12 and a valve member 14 arranged inside the joint main body 12. An annular end face sealing member 20 attached to the front end portion 18 of the valve member 14 and a holder 24 arranged on the outer peripheral surface 22 of the valve member 14 to hold the end face sealing member 20 at the front end portion 18 of the valve member 14. Be prepared. The valve member 14 has a front flow path 27 extending rearward from the front end opening 26, and the joint body 12 has a rear flow path 29 extending forward from the rear end opening 28. The joint body 12 and the valve member 14 are sealed by a sliding seal member 32, and a flow extending rearward from the front end opening 26 to the rear end opening 28 by the front flow path 27 and the rear flow path 29. Road 30 is configured. Further, a spring 34 for urging the valve member 14 forward (to the right in the figure) is arranged between the joint main body 12 and the valve member 14, and in the non-connected state of FIG. 1, the valve is The sealing surface 36 of the member 14 is pressed against the valve seat portion 38 of the joint main body portion 12 by the urging force of the spring 34, and the flow path 30 is closed. As shown in FIG. 2, when the corresponding pipe member 1 is pressed against the valve member 14 so that the front end sealing surface 2 abuts on the end surface sealing member 20, the valve member 14 closes the flow path 30. It is displaced rearward (to the left when viewed in the figure) from the position (FIG. 1) to the open position (FIG. 2) in which the flow path 30 is opened. At this time, the end face sealing member 20 is pressed against the front end sealing surface 2 of the pipe member 1 by the urging force of the spring 34, and is in a state of being sealed and engaged with the front end sealing surface 2. As a result, the pipe joint 10 is in a state of being connected to the corresponding pipe member 1.

バルブ部材１４は、少なくとも閉止位置にあるときには、継手本体部１２よりも前方にまで延在している。図３に示すように、バルブ部材１４の前端部分１８には、前端面４０とそこから前方に延びる筒状の支持部４２が形成されており、端面シール部材２０は前端面４０と支持部４２とに後方及び内側から支持された状態で、前端開口２６の周囲に配置されている。端面シール部材２０の外周面４３には前方に面した段差部４４が形成され、ホルダ２４の内周面４６には径方向内側に突出して端面シール部材２０の段差部４４を前方から係止する段差係止部４８が形成されている。したがって端面シール部材２０は、バルブ部材１４の前端面４０とホルダ２４の段差係止部４８とによって前後方向での位置が拘束されるとともに、バルブ部材１４の支持部４２とホルダ２４の内周面４６とによって径方向での位置が拘束されて、バルブ部材１４とホルダ２４との間に保持されることになる。 The valve member 14 extends to the front of the joint body 12 at least when it is in the closed position. As shown in FIG. 3, the front end portion 18 of the valve member 14 is formed with a front end surface 40 and a cylindrical support portion 42 extending forward from the front end surface 40, and the end surface sealing member 20 has a front end surface 40 and a support portion 42. It is arranged around the front end opening 26 in a state of being supported from the rear and the inside. A stepped portion 44 facing forward is formed on the outer peripheral surface 43 of the end face sealing member 20, and the stepped portion 44 of the end face sealing member 20 projects inward in the radial direction on the inner peripheral surface 46 of the holder 24 to lock the stepped portion 44 of the end face sealing member 20 from the front. A step locking portion 48 is formed. Therefore, the position of the end face sealing member 20 in the front-rear direction is constrained by the front end surface 40 of the valve member 14 and the step locking portion 48 of the holder 24, and the inner peripheral surface of the support portion 42 of the valve member 14 and the holder 24. The radial position is constrained by 46 and is held between the valve member 14 and the holder 24.

バルブ部材１４の外周面２２には、周方向に延びるリング保持溝５０が形成されており、このリング保持溝５０内にＣ字状のストップリング（係止リング）５２が配置されている。ストップリング５２は、リング保持溝５０から部分的に外側に飛び出していて、ホルダ２４の内周面４６に係合して僅かに縮径された状態となっている。ホルダ２４の内周面４６には、径方向内側に突出した係止突起５４が形成されている。この係止突起５４の前方面は前方に向かって径方向外側に傾斜した係止傾斜面５６となっており、後方面は後方に向かって径方向外側に傾斜した取付用傾斜面５８となっている。図３の状態においては、ホルダ２４を前方に向かって変位させようとすると、ストップリング５２が、係止傾斜面５６に係合してホルダ２４をバルブ部材１４の外周面２２上に係止する。 A ring holding groove 50 extending in the circumferential direction is formed on the outer peripheral surface 22 of the valve member 14, and a C-shaped stop ring (locking ring) 52 is arranged in the ring holding groove 50. The stop ring 52 partially protrudes outward from the ring holding groove 50, and is in a state of being slightly reduced in diameter by engaging with the inner peripheral surface 46 of the holder 24. A locking projection 54 projecting inward in the radial direction is formed on the inner peripheral surface 46 of the holder 24. The front surface of the locking projection 54 is a locking inclined surface 56 that is inclined outward in the radial direction toward the front, and the rear surface is an inclined surface 58 for mounting that is inclined outward in the radial direction toward the rear. There is. In the state of FIG. 3, when the holder 24 is to be displaced forward, the stop ring 52 engages with the locking inclined surface 56 and locks the holder 24 on the outer peripheral surface 22 of the valve member 14. ..

図３の状態からホルダ２４を前方に引っ張って、ホルダ２４に対して所定の大きさ以上の前方への力を加えると、図４に示すように、ストップリング５２が係止傾斜面５６に押されてリング保持溝５０内に向かって径方向内側に弾性変形する。さらにホルダ２４に力を加えていくと、図５に示すように、ストップリング５２が係止傾斜面５６を超えて、ストップリング５２によるホルダ２４に対する係止が解除される。ホルダ２４はさらに前方に変位して、図６に示す位置を通過し、最終的には図７に示すように、バルブ部材１４から取り外される。そうすると、ホルダ２４により保持されていた端面シール部材２０は、バルブ部材１４とホルダ２４との間から取り外すことができるようになる。なお、ストップリング５２は、ホルダ２４によって径方向外側から押えられていない状態でも、リング保持溝５０内に部分的に収容される内径を有しており、ホルダ２４が取り外されてもバルブ部材１４からすぐには外れないようにしてある。 When the holder 24 is pulled forward from the state of FIG. 3 and a forward force of a predetermined size or more is applied to the holder 24, the stop ring 52 is pushed against the locking inclined surface 56 as shown in FIG. Then, it elastically deforms inward in the radial direction toward the inside of the ring holding groove 50. When a force is further applied to the holder 24, as shown in FIG. 5, the stop ring 52 exceeds the locking inclined surface 56, and the lock of the holder 24 by the stop ring 52 is released. The holder 24 is further displaced forward, passes through the position shown in FIG. 6, and is finally removed from the valve member 14, as shown in FIG. Then, the end face sealing member 20 held by the holder 24 can be removed from between the valve member 14 and the holder 24. The stop ring 52 has an inner diameter that is partially accommodated in the ring holding groove 50 even when the stop ring 52 is not pressed from the outside in the radial direction by the holder 24, and the valve member 14 even if the holder 24 is removed. I try not to come off immediately.

端面シール部材２０を取り付ける際には、端面シール部材２０をバルブ部材１４の前端部分１８に配置し、ホルダ２４を後方に押し込むようにする。そうすると、図６に示すように、ホルダ２４の取付用傾斜面５８がストップリング５２に係合し、ストップリング５２が取付用傾斜面５８に押されてリング保持溝５０内に向かって径方向内側に弾性変形する。さらにホルダ２４を後方に押し込むと、係止突起５４がストップリング５２の外側を通過し、係止傾斜面５６がストップリング５２の後方に位置する図３の状態に戻る。これによりホルダ２４はストップリング５２によってバルブ部材１４の外周面２２上に係止された状態となり、端面シール部材２０の取り付け作業は完了する。 When attaching the end face sealing member 20, the end face sealing member 20 is arranged at the front end portion 18 of the valve member 14 so that the holder 24 is pushed backward. Then, as shown in FIG. 6, the mounting inclined surface 58 of the holder 24 engages with the stop ring 52, and the stop ring 52 is pushed by the mounting inclined surface 58 and is radially inward toward the inside of the ring holding groove 50. Elastically deforms to. When the holder 24 is further pushed backward, the locking projection 54 passes outside the stop ring 52, and the locking inclined surface 56 returns to the state of FIG. 3 located behind the stop ring 52. As a result, the holder 24 is locked on the outer peripheral surface 22 of the valve member 14 by the stop ring 52, and the attachment work of the end face sealing member 20 is completed.

なお、ホルダ２４の取り外しに必要な所定の力は、ストップリング５２の剛性や、係止傾斜面５６の大きさ及び角度等を変更することにより、任意の大きさに変更することができる。この所定の力を大きくするほど誤ってホルダ２４が外れてしまう可能性を小さくすることができるが、それに伴ってホルダ２４を取り外す作業が作業者にとって大変になる。当該実施形態においては、ホルダ２４の外周面５９における継手本体部１２から露出する場所に工具溝６０（図３）を設けて、この工具溝６０にマイナスドライバーなどの工具を引っ掛けられるようにし、ホルダ２４を取り外すのに大きな力が必要となる場合においても工具により比較的に容易にホルダ２４を取り外すことができるようにしている。 The predetermined force required for removing the holder 24 can be changed to an arbitrary size by changing the rigidity of the stop ring 52, the size and angle of the locking inclined surface 56, and the like. Increasing this predetermined force can reduce the possibility that the holder 24 will be accidentally removed, but the work of removing the holder 24 becomes difficult for the operator. In the embodiment, a tool groove 60 (FIG. 3) is provided on the outer peripheral surface 59 of the holder 24 at a position exposed from the joint body portion 12 so that a tool such as a flat-blade screwdriver can be hooked on the tool groove 60. Even when a large force is required to remove the 24, the holder 24 can be removed relatively easily with a tool.

このように当該管継手１０においては、ホルダ２４をバルブ部材１４に対して前方に変位させるだけで端面シール部材２０を取り外すことが可能な状態とすることができる。またホルダ２４をバルブ部材１４に対して後方に変位させるだけで端面シール部材２０を取り付けることができる。したがって、当該管継手１０においては、端面シール部材２０の交換を容易に行なうことが可能となる。 In this way, in the pipe joint 10, the end face sealing member 20 can be removed by simply displacing the holder 24 forward with respect to the valve member 14. Further, the end face sealing member 20 can be attached only by displacing the holder 24 rearward with respect to the valve member 14. Therefore, in the pipe joint 10, the end face sealing member 20 can be easily replaced.

以上に本発明の実施形態について説明をしたが、本発明はこの実施形態に限定されるものではない。例えば、バルブ部材を有さず、流路構成部材が実質的に継手本体部のみによって構成されるようにしてもよい。また、リング保持溝と係止突起の位置関係を逆にしてもよい。すなわち、ホルダの内周面にリング保持溝を形成し、バルブ部材の外周面に係止突起を設けて、ストップリングがホルダ側に保持されるようにしても良い。また、係止リングとして、Ｃ字状のストップリング以外の径方向に弾性変形可能な他のリング状弾性部材を利用してもよい。さらには、ホルダは、端面シール部材を取り外せる位置にまで変位できるようになっていれば、流路構成部材から完全に取り外されるようになっている必要は必ずしもない。 Although the embodiment of the present invention has been described above, the present invention is not limited to this embodiment. For example, the valve member may not be provided, and the flow path constituent member may be substantially composed of only the joint main body portion. Further, the positional relationship between the ring holding groove and the locking projection may be reversed. That is, a ring holding groove may be formed on the inner peripheral surface of the holder, and a locking projection may be provided on the outer peripheral surface of the valve member so that the stop ring is held on the holder side. Further, as the locking ring, another ring-shaped elastic member that can be elastically deformed in the radial direction other than the C-shaped stop ring may be used. Further, the holder does not necessarily have to be completely removed from the flow path constituent member as long as it can be displaced to a position where the end face sealing member can be removed.

１管部材
２前端密封面
１０管継手
１２継手本体部
１４バルブ部材
１６流路構成部材
１８前端部分
２０端面シール部材
２２外周面
２４ホルダ
２６前端開口
２７前方流路
２８後端開口
２９後方流路
３０流路
３２摺動シール部材
３４スプリング
３６シール面
３８弁座部
４０前端面
４２支持部
４３外周面
４４段差部
４６内周面
４８段差係止部
５０リング保持溝
５２ストップリング（係止リング）
５４係止突起
５６係止傾斜面
５８取付用傾斜面
５９外周面
６０工具溝 1 Pipe member 2 Front end sealing surface 10 Pipe joint 12 Joint body 14 Valve member 16 Flow path component 18 Front end part 20 End face sealing member 22 Outer surface 24 Holder 26 Front end opening 27 Front flow path 28 Rear end opening 29 Rear flow path 30 Flow path 32 Sliding seal member 34 Spring 36 Seal surface 38 Valve seat portion 40 Front end surface 42 Support portion 43 Outer peripheral surface 44 Step portion 46 Inner peripheral surface 48 Step locking portion 50 Ring holding groove 52 Stop ring (locking ring)
54 Locking protrusion 56 Locking inclined surface 58 Inclined surface for mounting 59 Outer peripheral surface 60 Tool groove

Claims

A flow path component that defines a flow path extending rearward from the front end opening,
An annular end face sealing member arranged around the front end opening on the front end face of the flow path component, and
A holder that is arranged on the outer peripheral surface of the flow path component and holds the end face sealing member around the front end opening.
A locking ring that is held in a ring holding groove formed on the outer peripheral surface of the flow path constituent member, engages with the inner peripheral surface of the holder, and locks the holder at a position where the end face sealing member is held. And with
It is formed latching projection which projects inwardly to the inner peripheral surface of the holder, a locking inclined surface forward surface is inclined radially outwardly toward the front of the locking projections, locking The rear surface of the protrusion is an inclined surface for mounting that is inclined outward in the radial direction toward the rear.
When a forward force of a predetermined magnitude or more is applied to the holder, the locking ring is pushed by the locking inclined surface and elastically deformed into the ring holding groove by the locking ring. The lock to the holder is released, the holder is displaced forward so that the end face sealing member can be removed from between the flow path component and the holder .
When the holder is displaced rearward with respect to the flow path component from a position where the end face sealing member can be removed, the locking ring is pushed by the mounting inclined surface into the ring holding groove. A pipe joint that is elastically deformed inward in the radial direction so that the locking projection passes outside the locking ring and the locking inclined surface engages the locking ring.

A flow path component that defines a flow path extending rearward from the front end opening,
An annular end face sealing member arranged around the front end opening on the front end face of the flow path component, and
A holder that is arranged on the outer peripheral surface of the flow path component and holds the end face sealing member around the front end opening.
A locking ring that is held in a ring holding groove formed on the inner peripheral surface of the holder, engages with the outer peripheral surface of the flow path component, and locks the holder at a position where the end face sealing member is held. And with
A locking projection protruding outward is formed on the outer peripheral surface of the flow path component, and the rear surface of the locking projection is a locking inclined surface inclined radially outward toward the front. The front surface of the locking projection is an inclined surface for mounting that is inclined outward in the radial direction toward the rear.
When a forward force of a predetermined magnitude or more is applied to the holder, the locking ring is pushed by the locking inclined surface and elastically deformed into the ring holding groove by the locking ring. The lock to the holder is released, the holder is displaced forward so that the end face sealing member can be removed from between the flow path component and the holder.
When the holder is displaced rearward with respect to the flow path component from a position where the end face sealing member can be removed, the locking ring is pushed by the mounting inclined surface into the ring holding groove. A pipe joint that is elastically deformed inward in the radial direction so that the locking projection passes outside the locking ring and the locking inclined surface engages the locking ring.

A flow path component that defines a flow path extending rearward from the front end opening,
An annular end face sealing member arranged around the front end opening on the front end face of the flow path component, and
A holder that is arranged on the outer peripheral surface of the flow path component and holds the end face sealing member around the front end opening.
It is held in a ring holding groove formed on one of the outer peripheral surface of the flow path constituent member and the inner peripheral surface of the holder, and the outer peripheral surface of the flow path constituent member and the inner peripheral surface of the holder. A locking ring that engages with the other surface of the holder and locks the holder at a position that holds the end face sealing member.
The other surface is provided with a locking inclined surface that is inclined outward in the radial direction toward the front.
When a forward force of a predetermined magnitude or more is applied to the holder, the locking ring is pushed by the locking inclined surface and elastically deformed into the ring holding groove by the locking ring. The lock to the holder is released, the holder is displaced forward so that the end face sealing member can be removed from between the flow path component and the holder.
A pipe joint in which the flow path component member has a support portion extending forward from the front end surface and supporting the inner peripheral surface of the end surface sealing member.

A flow path component that defines a flow path extending rearward from the front end opening,
An annular end face sealing member arranged around the front end opening on the front end face of the flow path component, and
A holder that is arranged on the outer peripheral surface of the flow path component and holds the end face sealing member around the front end opening.
It is held in a ring holding groove formed on one of the outer peripheral surface of the flow path constituent member and the inner peripheral surface of the holder, and the outer peripheral surface of the flow path constituent member and the inner peripheral surface of the holder. A locking ring that engages with the other surface of the holder and locks the holder at a position that holds the end face sealing member.
The other surface is provided with a locking inclined surface that is inclined outward in the radial direction toward the front.
When a forward force of a predetermined magnitude or more is applied to the holder, the locking ring is pushed by the locking inclined surface and elastically deformed into the ring holding groove by the locking ring. The lock to the holder is released, the holder is displaced forward so that the end face sealing member can be removed from between the flow path component and the holder.
A cylindrical joint main body, a closing position where the flow path component is arranged inside the joint main body and closes the flow path, and an open position where the flow path is displaced rearward from the closing position to open the flow path. Has a valve member displaceable between and
A pipe joint in which the valve member extends forward from the joint main body portion at least in the closed position, and the end face sealing member and the holder are attached to the front end portion of the valve member.

A step portion facing forward is formed on the outer peripheral surface of the end face sealing member.
The pipe according to any one of claims 1 to 4, wherein the holder has a step locking portion that locks the step portion of the end face sealing member from the front when attached to the flow path constituent member. Fittings.

The pipe fitting according to any one of claims 1 to 5, wherein the locking ring is a C-shaped stop ring.